Buscador de Tesis y publicaciones académicas

Correction: Effects of violence on executive function: a neuropsychological and predictive analysis in victims of the armed conflict in Colombia

Loida Camargo · Aida Patricia Manjarrés · Marina B. Martínez-Gonzalez

Search for K S ( L ) 0 → π + π − μ + μ − decays at LHCb

R. Aaij · A. S. W. Abdelmotteleb · C. Abellan Beteta · F. Abudinén · y 196 más

A search for K S ( L ) 0 → π + π − μ + μ − decays is performed using proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb − 1 . No K S ( L ) 0 → π + π − μ + μ − signals are found and upper limits are set for the first tim...

Machine Learning-Enhanced Modeling of Heavy Metal Adsorption onto Coal Fly Ash-Derived Zeolite P

Benito A. Hernández-Guerrero · Lorena Martínez · Gabriel Peña-Rodríguez · Fernando Trejo

Zeolite P was synthesized by hydrothermal treatment of coal fly ash and applied to the individual removal of six heavy metals (Pb2+, Ni2+, Cu2+, Cr3+, Hg2+, Cd2+) from aqueous solutions. Characterization by SEM-EDS, FTIR, BET, XRD, zeta potential, and XPS revealed a BET surface area of 30 m2/g, Si/Al ratio of 1.63, and...

Effects of the Ratio of Rotation to Welding Speed on the Mechanical Properties of the Friction-Stir Welds of the Dissimilar Aluminum Alloys AA5052-H32 and AA6261-T6

Pablo R. Valle · Fernando Franco · Martha Sevilla · Dario Benavides

Solid-state welding processes, particularly friction-stir welding (FSW), offer significant advantages for joining different aluminum alloys due to their good mechanical performance, energy efficiency, and cost-effectiveness. The FSW of the AA5052-H32 and AA6261-T6 alloys has not been previously reported. In this study,...

El aprendizaje organizacional como eje estratégico en la gestión docente de universidades inteligentes

Arley Denisse Vega Ochoa · Zoraima Patricia Romero Oñate · María Carolina Araujo Arzuaga

Hoy en día, la educación ha transcendido los espacios físicos de colegios y universidades para transformarse en un compromiso que toca a todos como sociedad, esta realidad exige como reto de abrir las puertas del conocimiento, logrando que el saber deje de ser un privilegio y se convierta en una herramienta real para c...

Computational Screening of N-Doped Graphene-Supported Cu-Sc Nanoclusters for CO2 Capture

Katherine Liset Ortiz Paternina · Joaquín Hernández Fernández

Converting carbon dioxide (CO2) into value-added chemicals and/or capturing it before emission are complementary strategies to mitigate rising atmospheric CO2 levels. Copper-based materials are widely investigated for CO2 conversion because Cu can bind and electronically activate CO2 and related intermediates. In this...

Different Switching Strategy for a Quadratic Boost Converter Based on Non-Series Energy Transfer (QBC-NSET)

Luis Humberto Diaz-Saldierna · Julio C. Rosas-Caro · Jesus Leyva-Ramos · José G. González-Hernández · y 2 más

This paper explores a new switching strategy for a recently proposed quadratic boost converter. The topology under study is a high-step-up DC–DC converter with a configuration that allows a portion of the processed energy to be used in what we call a non-series transfer. This characteristic reduces the amount of power...

Determining Factors of Tourism Resilience in the Face of Global Crises: Adaptability and Competitiveness

Juanita Angélica Monroy Mongua · Luz Natalia Tobón Perilla

This study examines the determinants of tourism resilience and recovery following global crises using a comparative cross-country approach. A composite Tourism Resilience Index (TRI) is constructed based on post-crisis recovery in tourism employment, tourism GDP and international arrivals, and its determinants are anal...

Radon-Guided Wavelet-Domain Attention U-Net for Periodic Artifact Suppression in Brain MRI

Jesus David Rios-Perez · German Sanchez-Torres · John W. Branch-Bedoya · Camilo Andres Laiton-Bonadiez

Periodic artifacts such as ringing (Gibbs), herringbone (spike/corduroy), and zipper patterns degrade the quality of brain MRI. We present a reproducible framework that (i) synthetically generates periodic artifacts with controllable severity directly in k-space, (ii) normalizes pattern orientation through a Radon-guid...

Non-Markovian fluorescence dynamics in rare-earth systems

H. Triviño · F. Mesa

We investigate the fluorescence dynamics of the rare-earth ions europium, terbium, and gadolinium, with particular emphasis on quantifying non-Markovian behavior. By employing fluorescence as a probe, we characterize deviations from memoryless dynamics and identify clear distinctions between Markovian and non-Markovian...